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add_query_arg › WordPress Function
Parametri: (3) |
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Retrieves a modified URL query string.
You can rebuild the URL and append query variables to the URL query by using this function. There are two ways to use this function; either a single key and value, or an associative array.
Using a single key and value:
add_query_arg( 'key', 'value', 'http://example.com' );
Using an associative array:
add_query_arg( array(
'key1' => 'value1',
'key2' => 'value2',
), 'http://example.com' );
Omitting the URL from either use results in the current URL being used
(the value of $_SERVER['REQUEST_URI']
).
Values are expected to be encoded appropriately with urlencode() or rawurlencode().
Setting any query variable's value to boolean false removes the key (see remove_query_arg()).
Important: The return value of add_query_arg() is not escaped by default. Output should be late-escaped with esc_url() or similar to help prevent vulnerability to cross-site scripting (XSS) attacks.
Sorgenti
function add_query_arg( ...$args ) { if ( is_array( $args[0] ) ) { if ( count( $args ) < 2 || false === $args[1] ) { $uri = $_SERVER['REQUEST_URI']; } else { $uri = $args[1]; } } else { if ( count( $args ) < 3 || false === $args[2] ) { $uri = $_SERVER['REQUEST_URI']; } else { $uri = $args[2]; } } $frag = strstr( $uri, '#' ); if ( $frag ) { $uri = substr( $uri, 0, -strlen( $frag ) ); } else { $frag = ''; } if ( 0 === stripos( $uri, 'http://' ) ) { $protocol = 'http://'; $uri = substr( $uri, 7 ); } elseif ( 0 === stripos( $uri, 'https://' ) ) { $protocol = 'https://'; $uri = substr( $uri, 8 ); } else { $protocol = ''; } if ( strpos( $uri, '?' ) !== false ) { list( $base, $query ) = explode( '?', $uri, 2 ); $base .= '?'; } elseif ( $protocol || strpos( $uri, '=' ) === false ) { $base = $uri . '?'; $query = ''; } else { $base = ''; $query = $uri; } wp_parse_str( $query, $qs ); $qs = urlencode_deep( $qs ); // this re-URL-encodes things that were already in the query string if ( is_array( $args[0] ) ) { foreach ( $args[0] as $k => $v ) { $qs[ $k ] = $v; } } else { $qs[ $args[0] ] = $args[1]; } foreach ( $qs as $k => $v ) { if ( $v === false ) { unset( $qs[ $k ] ); } } $ret = build_query( $qs ); $ret = trim( $ret, '?' ); $ret = preg_replace( '#=(&|$)#', '$1', $ret ); $ret = $protocol . $base . $ret . $frag; $ret = rtrim( $ret, '?' ); return $ret; }